Quartz lamp for medical purposes



June 1,1926. 1,586,670

F. GIRARD QUARTZ LAMP FOR MEDICAL PURPOSES Filed August 24, 1921 Patented June 1, 1926.

UNITED STATES FRITZ airman, or HANAu-QN-THE-MAIN, GERMANY.

QUARTZ LAMP FOR MEDICAL runrosns.

Application filed August 24,1921, Serial No. 494,982, and in Germany July 1 916.

(GRANTED UNDER THE raovxsioivsor TnE Ac 01mm 3, 1921, 41 STAT. I..,1313.) 1 l My invention relates to a quartz lamp for medical irradiation andits particular object is to provide a lamp of this kind which although being devoid of the water cooling 6 arrangement generally used is superior to water-cooledlamps. I

A drawback inherent in quartz lamps consists in the fact that the ultra violet light is not intensified at all or only very little by primitive reflectingfaces, and therefore does not suliice for an intense irradiation of small parts of the surface of the human body. The lamps provided with water cooling are 15 because they permit placing the part of" the body to be irradiated close to the source of light. However, the water cooling system involves many inconveniences, amongst.

others, the necessity of providing means for supplying and d scharging the water, frequent leakages, which cause expensive rethe shortest wave lengths by the layer of 2 water itself and particularly by the deposits tionof light.

In the lamp according to the present in- 3 vention these drawbacks are obviated inasably stronger.

In the drawings aflixed to this specificadrawings Fig. 1 is a diagram showing 'the arrange ment of the lamp,

Fig. 2 is an elevation, partly in section,

Fig. 3 a plan view. The intensified radiation is effected by aid oftwo prisms arranged at a short distance from'and parallel to the arc'L. The prisms are made of quartz or rock crystal and have the form of rectangular isosceles triangles, the hypothenuse faces of which are not covered with a reflecting. layer, as such a layer would be destroyed by the heat of the quartz burner which is about 500 degrees C, The hypothenusefaces reflect the light which is radiated by the are in an upward and downward direction at an angle of about 60 and which otherwise is almost entirely lost, in the direction of use, as indicated by the least affected by this drawback,

length. pairs, and the filtering of the rays having from the flowing water 'settling on the within a ballshaped metal casing E pro; quartz burner and which reduce the radiamuch as the radiation of light is consider bundle of light rays can be rotated with the,

the same in any position.

'cally upwards and downwards, which is of rays 2, 4 and 61 Consequently, the entire Kuantity of. light emitted from the surface B, which can be utilized is'considerablv increased. The light is further intensified, although to a'less degree, by a reflector R. while a conical metal pipe K polished on the inside collects the raysemitted by the burner, the prism and the reflector and at the be usedas a blue filter to prevent the emission of ultra violet rays of shortest wave Figs. Zand 3 illustrate a lamp constructed on the lines referred to above. The optical arrangement described above is mounted quartz burner is secured to these trunnions and its electrical leads are arranged within the 'trunnions. The prisms P, the relflector R and the conical pipe K are fixed to the metal casing, so thatthe concentrated casing about 300 degrees, its intensity being It is therefore possible, to irradiate notonly in a horizontal direction, as with a lamp cooled by water,

but also at an angular position and vertithe greatest importance when irradiating cavities of the human body. For this and other'purposes, special fittings such as M' (Fig. 2) are required, which are placed in'1 direct contact with the parts of the body to be treated, sometimes under pressure, as.

in-the so called compression'treatment. lie

sides special fittings, quartz filters may be used in this manner. When using these fittings or filters it 1s necessary to counteract the heating effect of the quartz burner. .Vhile this is done in the lamps hitherto used by water cooling, I achievethe same object in a far simpler manner by means of a suitable combination of heat insulation and ventilation or a simple air cooling. A supply or discharge of water .is no longer required, there can be no leakages and no defective insulation caused thereby, the expensive quartz burner canno longerbe damaged by defectsin the Water cooling device, which necessitate expensive and tedious repairs disturbing the work of the physician to an extraordinaryextent. This is effected by melting the support N for the fitting of perforated sheet gnetal and attaching it to the casing E by means of a thick layer of asbestos ,of special form. By these means, the conduction of heat from the metal casingE is reduced to a minimum and the radiation of heat from the most remote part of the conical reflector pipe K is prevented- There is left between the ventilating openings as little metal as possible, whereby the heating of thefrontal portion of the support is reduced to a minimum, so that the supports remain sufiiciently cool for therapeutic purposes. The trunnions Z are secured to a semi-circular arm 1, which is adapted to be tilted about a horizontal pin. This pin is secured in a head which is adapted to be rotated about a vertical pin, the position of which latter pin may be altered in a stand which at the same time forms a series resistance and whose weight greatly increases the stability of the entire apparatus.

I Wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to persons skilled in the art.

I claim:

1. Therapeutica-l device comprising in combination, a mercury vapor lamp, a pair of totally reflecting prisms disposed close to and in parallel to said lamp and a conical reflector in front of said lamp and said prisms.

2. Therapeutical device comprising in combination, a mercury vapor lamp, a pair of totally reflecting prisms disposed close to and in parallel tosaid lamp, a conical reflector in front of said lamp and said prisms, and means connected with said reflector for preventing the passage of heat rays.

3. Therapeutical device comprising in combination, a mercury vapor lamp, a pair of totally reflecting prisms, disposed close to and in parallel to said lamp, a conical reflector in front of said lamp and said prisms and a pane of a material preventing the "parts.

5. Therapeutical device comprising in Combination, a mercury vapor lamp, a pair of totally reflecting prisms disposed close to and in parallel'to said lamp, a conical reflector in front of said lamp and said prisms and a casing surrounding all these parts, said casing being arranged to be turned about a horizontal axis,

6. Therapeutical device comprising in combination, a mercury vapor lamp, a pair of totally reflecting prisms disposed close to and in parallel to said lamp, a conical reflector in front of said lamp and said prisms, a casing surrounding all these parts and perforate pivot pins carrying said lamp and said casing- 7. 'lherapeutical device comprising in combination, a mercury vapor lamp, a pair of totally reflecting prisms disposed close to and in parallel to said lamp, a conical reflector in front of said lamp and said prisms, a casing surrounding all these parts, perforate pivot pins carrying said lamp and said casing and a curved arm carrying said pins and being arranged to be turned about a horizontal axis.

8. Therapeutical device comprising in combination, a mercury vapor lamp, a pair of tot-ally reflecting prisms disposed close to and in parallel to said lamp, a conical reflector in front of said lamp and said prisms, a casing surrounding all these parts and a thin walled perforate support fixed to said casing and insulated therefrom against heat convection.

9. Therapeutical device comprising in combination, a mercury vapor lamp, a pair of totally reflecting prisms disposed close to and in parallel to said lamp, a conical reflector in front of said lamp and said prisms, a casing surrounding all these parts, a thin walled perforate support fixed to said casing and insulated therefrom against heat convection and a ring on said suppor for attaching special fittings.

In testimony 'whereof I affix my signature FRITZ GIRARD. 

